vue实现数字滚动效果

<template>
 <div class="num-block">
  <div class="num-block_show">
   <div class="num-block_numbers" :class="{'ellipsis': !isNum(item)}" v-for="(item, key) in numbers" :key="key">
    <!-- <ul class="num-block_ul" :style="ulStyles(noNumbers(item, key))" v-if="isNum(item)"> -->
    <ul class="num-block_ul" :style="ulStyles(item, key)" v-if="isNum(item)">
     <!-- <li v-for="(opt, index) in noNumbers(item, key)" :key="index">
      {{ opt }}
     </li> -->
     <li>0</li>
     <li>1</li>
     <li>2</li>
     <li>3</li>
     <li>4</li>
     <li>5</li>
     <li>6</li>
     <li>7</li>
     <li>8</li>
     <li>9</li>
    </ul>
    <div class="num-block_ellipsis" v-else>,</div>
   </div>
  </div>
  <!-- <div style="position:absolute;top:250px;left:0">
   {{ this.numbers }}
  </div> -->
 </div>
</template>

<script>
 export default {
  name: "ws-num-block",
  props: ['data'],
  data() {
   return {
    currentData: '10',
    lastData: '10'
   }
  },
  computed: {
   numbers() {
    let data = this.data;
    if(!data) {
     return
    }
    data = this.dealData(data);
    return data;
   }
  },
  watch: {
   data(val){
    let lastData = this.currentData;
    this.currentData = this.dealData(val);
    this.lastData = lastData;
   }
  },
  methods: {
   noNumbers(item, key) {
    let lastData = this.lastData;
    let lastItem = this.lastData[key];
    let result = [];
    lastItem = lastItem "sass">
 .num-block
  width: 100%
  height: auto
  &_show
   display: flex
   justify-content: center
   height: 30px
   overflow: hidden
  &_numbers
   position: relative
   width: 14px
  &_numbers.ellipsis
   width: 6px
  &_ul>li
   height: 30px
   line-height: 30px
  &_ellipsis
   position: absolute
   left: 0
   top: 0
   width: 6px
</style>